Winding machine



(lath 211 9 E9240 Lafiw E. N. LIGHTFQQ WINDING MACHINE s sheets-sheet 1Filed Feb 25'.

s Sheets-Sheet s ct. g E. N. LIGHT-FOOT WINDING MACHINE Fild Feb. 26,

Oci. 21 1924. I 1,512,116

- r-z. N. LIGHTFLOOT:

WINDING MACHINE I Filed Feb, 26, 1920 6 Sheets-Sheet 4' Get. 21 192% E.N. LIGHTFOOT WINDING MACHINE 1920 6 Sheets-Sheet 5 Filed Feb. 26

AVE

' E. N. LLGHTFOOT WINDING MACHINE Filed Feb. 26, 1920 6 Sheets-Sheet 6Patented Get. 21, 1924.

EDWIN N. men'rroor or new MFG. (30., OF MILWAUKEE, WISCONSIN,

YORK, N. Y., ASSIGNOR TO THE A' CORPORATION OF WISCONSIN.

WINDING MACHINE.

' Application filed February 26, 1920. Serial No. 361,513.

To all whomz't may concern.

Be it known that I, EDWIN N. LIGET'FOOT,

a citizen of the United States, residing at New York, in the county ofBrtnx and State of New York, have invented new and useful Improvementsin Winding Machines, of which the following is a specification.

This invention relates to Winding machines. -Such machines areparticularly useful for winding a resistance wire or strip, commonlycalled a resistor, on a flat insulating core, although not limited tosuch use.

An object of this invention is to provide an improved winding machinewherein the pitch may be readily and quickly varied during the operationthereof.

Another object is to provide means for presetting a change in pitchwhereby the change in pitch may be made quickly during the windingoperation.

Another ob'ect is to provide improved means for feeding and guidingthrough the winding head the insulating core upon which the resistor isto be wound.

Another object is to provide improved means for guiding the material tobe wound to the core on which it is to be wound.

Another object ,is to'so apply the resistor to the insulating core thatboth are fully protected against damage.

' Other objects and advantages will appear from the specification andclaims.

An embodiment of the invention is illustrated in the accompanyingdrawings.

In the drawings, v

Figurel is a top planof the winding machine, parts of the.winding headbeing omitted for the sake of clearness.

Fig. 2 is a vertical section on line 22 of Fig. 1;

Fig. 3 is a. front elevation 'of the pitch adjuster;

Fig. i is a vertical section on line 4-4 of Fig. 3;

Fig. 5 is a front elevation of the winding head; i

Fig. 6 is a horizontal section through the oscillating guide on line 6-6of Fig. 5; Fig. 7 is a central vertical section through Fig. 5;

Fig. 8 is an enlarged view of the adjustable core guide shown in Fig. 7

Fig. 9 is a vertical section on line 9-9 of Fig. 8; I

Fig. 10 is a horizontal section on line 10-10 of Fig. 8;

Fig. 11 is a perspective of the adjustable plate and arm of the coreguide; and

Fig. 12 is a perspective of the roller carrying arm of the core guide.

The winding machine comprises, in general, a winding head 5 for winding3. resistor on'an insulating core, a pulling stock 6 for pulling theinsulating ,core through an opening in the winding head and a pitchadjuster 7 for controlling the relative speed of travel of the pullingstock and of rotation of the winding head, whereby the pitch *atwhichthe resistor is wound upon the insulating core may be adjusted.

Referring to Figures 1 and 2, the bed plate 15 of the winding machinemay rest upon a suitable support such as, for example,- a bench 16.

The driving shaft 17 is journaled near each end in supports 18 and 19depending from the bed plate 15 through openings 20 and 21 in the bench16. The shaft 17 1s provided with a driving pulley 22 bywhich thewinding machine may be driven from any suitable source of power.

A spur gear 23 keyed to the shaft 17 drives the winding head. A bevelgear 24 provided on one end of the shaft 17 meshes with a second bevelgear 25 and through suitable mechanism to be described drives thepulling stock feed screw 26 journalled in brackets 27 and 28 mountedupon the bed plate 15.

The driving shaft 17 and the spur gear 23 and the bevel gear 24 carriedthereby and the shaft bearings constitute a unit which is removable sothat another unit having different gear ratios may be substitutedtherefor.

The bevel gear 25 may be fastened by means of a nut 25 and a suitablekey to a vertical shaft 30 to the upper end of which may be keyed afriction plate or disk 31. The shaft 30 is journalled in a verticalextension 32 of a removable plate 32which 'forms a closure for anopenlng in the bed plate15. The plate 32 is fastened to the bed plate 15by means of screws 33. The shaft 30 is provided with a flange 34 whichCUTLER-HAMMER rests upon a shoulder on the vertical extension 32 of theplate 32 whereby the shaft is supported.

The friction plate or disk 31 is movable along the shaft and is urgedupward by a coil spring 35 surrounding the shaft. One end of the spring35 rests against the bottom of the friction plate 31 and the other endagainst a collar 36 surrounding the shaft. The collar 36 rotates withthe shaft and is slidable thereon, the shaft being provided with a slot37 through which extends a pin 38 fastened in the collar 36. Thetensionof the spring 35 may be varied by means of an adjusting screw 39extending through a threaded opening in the shaft 30. The pin 38 restsupon the upper end of the adjusting screw 39,which may be locked inadjusted position by a lock nut 39'.

A felt washer 40 between the vertical extension 32 of the plate 32 andan annular downwardly extending flange 41 on the friction plate 31protects the shaft bearing and associated parts from dust,;dirt, etc.

The friction plate prwheel 31 is provided with a friction sii'rface ofsuitable material, such as,-for.example, leather 42.

Theyjp'late 32 and; the parts carried thereby constitute-a unit. whichmay be easily and quickly removed for inspection and repairs byloosening the screws-33.v This may be'done without disturbing anyother-part of'the windingmachine;

'able on the shaft 30, becomes badly worn, it

may be' easilyand quickly removed therefrom and-replaced by a new plate.

The friction plate 31' drives awheel 43 of suitable material, such as,for example fibre and is maintained in contacttherewith by.

the spring 35. The fibre wheel 43 is secured to a sleeve 44 by means ofa nut 45 and may therefore be readily removed andreplaced by anotherwheel when desired.

The sleeve 44 is. 'ournall'ed 'in abracket 46 mounted upon til keyedto ashaft 47 journalled in the bracke bed plate 15 and} is et 27. The outerend of the shaft 47 isprovided with a spur gear 48 meshing-witha spurgear 49 on the end of thefeed screw-126$ The sleeve 44 is provided withtwo flanges 50 and 51. In the groove thus formed bee'xtending pins53'and' 54. (See Fi s; 3 and 4.) The pin 53 works in the. slot 0 aguide. 55 carried by the arm -56"o f'a fork pivoted on a spindle 57which may be supported in" a frame 58 secured. to the bed'plate 15. Thea other pin' 54cworks in th'e'slot of a similar guide 59- carried by theother arm60 of the' the desired pitches on'the scale 63. One of pivotedfork.

and 69 in adjusted position.- I

Beforei starting to wind the resistor on.

the sleeve 44 on the shaft 47. When the sleeve 44 is moved to'the right,the fibre wheel 43 is moved nearer the center of the friction plate 31whereby the speed of the sleeve is reduced. In this way the speed ofrotation of the pulling stock feed screw 26 may be varied to control thepitch ofthe resistor being wound u on the insulating core.

The front arm 56 a so carries a pointer 62- pointer 62 is opposite thedesignation on the scale 63 which indicates the desired pitch. The forkmay then be locke'd'in this position by'turning the handle 61 to tightenthe screw 65 thus locking. the plate 64 and the arm- 56 between the head67 of the sore and the inner end of the handle'61.

.1 In some classes of apparatus in whichheatjing elements are used, itis desirable that,

'85 windingma'chine for the desired pitch, the fork is moved by thehandle 61 until the some portion or portions of the heating unit Idevelop greater heat than other portions. When the friction plate 31,'which 1sslid-" Where the" heating element employed comdegrees ofheat indifferent portions thereof bywinding the/resistor with different num'bers of turns per unit length. Different "numbers of turns per unitlength are olotained by varying the pitch at which the resistoris wound.The present wind ng machinels arranged to wind a reslsto'r with fromapproximately two and three-quarters to seventy-two turns per inch.

The pitch adjuster of the winding machine is arranged so that it may bepreset for two different pitches whereby the pitch may be easily andquickly changed from one to the other during the winding operation.

To this end two adjustable stopscrews 68 and 69 are positioned onopposite sides of the arm 56. These adjustable screws are held. inthreaded lugs 70'and 71 provided on the face-of the plate 64. Lock nuts72 and .73 are provided for holdin g the screws 68 the insulating core,the arm 56 may be moved until the pointer 62 indicates one of lth e'stop screws 68 M69 is then adjusted until its inner end engages one sideof the arm- 56. 5Tl'1e pitch adjuster may then be preset for the otherof the desired pitches by moving the arm 56 until the pointer 62indicates the pitch on the scale 63. The other stop screw may then beadjusted until its inner end engages the side of the arm 56 When the'proper length of the insulating core has been wound with the resistor atthe desired pitch, the machine may' be quickly changed to wind atthe'other preset pitch. This may be accomplished by grasping the handle61 and quickly moving the arm 56 until it rests against the end of theother adjustable stop screw. Other spur gears mounted upon studsjournalled in bearings 74 and 75-may be provided for changing the ratioof speed between the pulling stockfeed screw 26 and the shaft 47. Thesespur gears would mesh with each other and with spurgears of suitablesize on the shaft 47 and the feed screw 26. Motion would then betransmitted from the spurgear on the shaft 47, through the gearsjournalled in the bearings 75 and 74 to the gear on the feed screw 26.

The spur gears and the associated thumb nuts 48 and 49' are protected bya casing 76 fastened to the bracket 27 by means of wing bolts 77.

A dovetail track or slide comprising angle rails 78 and 79 andoverhanging cover strips 80 and 81 rests upon and is suitably secured tothe brackets 27 and '28. (See Figures 1, 2, 3 and 4.)

Figures 1 and 2 show the pulling stock which comprises a base 85 whichrests upon and is adapted to slide along the rails 78 and 79 of thetrack, and an upright 86 which may be formed integrally with the base 85or otherwise suitably secured thereto.

The pulling stock is operatively connected with the feed screw 26 bymeans of a half nut 87. The half nut 87 is normally maintained inengagement with the feed screw 26 by a coiled spring 88 seated in arecess in the base and resting against the half nut 87 The half nut 87may be moved out of engagement with the feed screw 26. To this end, arod 89, whose lower end is connected with the half nut 87, is pivotallyconnected with a lever 90 fulcrumed in the upper endof a pin 91 whichmay be screwed into the base 85'. The lever 90 is provided with a handle92 for moving the lever 90 on its fulcrum and thereby raising the halfnut out of engagement with the feed screw 26. The pulling stock may thenbe moved readily along the track to any desired position thereon.

The engagement and disengagement of.

vate the half nut 87, the handle 94 is'moved back into its centralposition thereby elevating the right hand end of the lever 90, whichcarries with it the connected rod 89 and half nut 87-against the forceof the spring 88,

The pulling stock is provided with a pair of clamping jaws 95 and 96 forgripping the insulating core upon which the resistor or resistance wireor strip is to be wound. These clamping jaws 95 and 96, the former ofwhich is pivoted at its rear end to the jaw 96, may be held in. clampingposition against the action of spring 97 by means of a clamping screw 98carried by a bracket 99 which is secured to the lower clamping jaw 95.

The clamping jaw 95 may be formed integrally with or otherwise suitablyattached to a cross head 100 which is adapted to be moved transverse tothe direction of travel of the pulling stock. This cross head 100 movesbetween guide rails 101 and 102 suitably secured to the front face ofthe upright 86. The cross head 100 may be locked in adjusted position bymeans of a clamping screw 103.

v The pulling stock carries a pointer 1.0-1 vv'hich'moves over a scale105 provided. on the cover strip 80. er and scale the operator of thewinding may readily determine when the proper amount of the resistor hasbeen wound upon the insulating core. The pointer and scale are also veryuseful for indicating to the operator when to shift the pitch adjustedto change from one to the other of the preset pitches,

hen winding the resistor upon curved insulating cores. and in order thatthe resistor may be wound evenly thereon. it. is desirable that thecurved insulating core be moved through the winding head along a lineapproximating the axis of curvature of the insulating core. This may beaccom- -plished b v causing the cross head 100 and the clamping jaws 95and 96 to move transverse to the line of travel of the pulling stockwhile the pulling stock is moving along said line of travel.

A bracket 105 therefore may be suitably secured to the track rail 79 bymeans of bolts or screws 106. A removable adjustable cam 107 may bemaintained by the arms of the bracket 105 in spaced relation to thepulling stock and in approximately the same horizontal plane with aroller 108 on one end of a splined shaft 109 carried by the cross headn' eans the p ,roller 103engaging the cam 107.

circular opening in which is supported a,

100. The particular form of the cam 107 employed depends upon thecurvature of the insulating core upon which the resistor is to be wound.

Whensetting the winding machine for winding the resistor upon curvedinsulating cores. the pulling stock is moved into the position shown inFigs. land 2. The handle 04 may then be-moved to the right or left topermit the half nut 87 to mesh with the feed screw 26'. The splinedshaft109 may be moved into a position with the The splined shaft 109 may thenbe locked to the cross head 100 by means; of" the clamping screw 110.'The clamping screw; 103 is loosened to unlock the crosshead'100.

/ During the operation of winding the resistor upon curved insulatingcores or strips and as the pulling stock is moved to the left the roller108 moves along the cam 107. The crosshead 100 with the associatedclamping jaws 95 and 96 is therefore gradually moved transverse to thelineof'travel of the pulling stock. This transverse movement is againstthe action of a spring 111 one end of which is secured to a pin 1 12-'carried by the guide rail 101, and the other end of which is securedtoapin 113 carried by the cross head 100FThis spring 111 maintains therllei'l:1.08':against thecam 107-. .7

The winding head comprises, in general, an adjustable guide for guidingthe insulating core therethrough, a spool for holding;

a supply of the resistor and apparatus for guiding the resistor from thespool and for applying the resistor to the insulating core: The assemblyoff'the winding head is shown in Figs. 1 and 2." Figs. to 12 inclusiveshow the details of thew inding head.

The winding head, part of which is stationary and part rotatable issupported by a bracket 114 mounted upon and'suitably secured to the-bedplate by,means of bolts The bracket 114 is provided with a hollowstationary bearing member 116.

This bearing member 116 islooked to the bracket 114 by means of. akey117 and a nut 11s. 3

uThe rotatable parts of the winding head are driven by a gear 119 which'revolves on the bearing member 116. This gear 119 is driven from gear 23on the drive shaft 17 through an idler tively control thewinding'operation may be formed integrally with. the gear 119 orotherwise suitably secured thereto as by bolts A removable spool 124 forsister is mounted upon the hub 125 of the gear 119. To permit the spool124 to revolve freely it rests upon rollers 126 and v gear .120- mountedon a stud 121 secured to the bracket 114. A handwheel 122 by which theoperator may posi holding the reagainst rollers, 127 supported by thehub 125.

The gear hub 125 and the spool 124 are" held in proper position on thebearing mem her 116 by upper and lower disk parts 128 and 129 restingin-a groove 130 in the bearing member 116 and suitably detachablysecured thereto by thumb screws 131. W

The speed ofthe spool 124 may be controlled by an adjustable brakemounted on the lower disk 129. This brake comprises a spring 132 ofsuitable material carried by the inner end of apusher rod 133. pusherrod 133 extends through a. thumb screw 134 threaded into a boss 135 onthe disk 129. The inner end of the thumb screw 134 engages the spring132. By turning the thumb screw 134. the tension of the brake spring 132may be adjusted VVhen-proper adjustment of the brake spring 132 has beenThis secured the thumb screw 1.34 may be locked the same. 7 v

' 'The adjustable plate 137 is provided with a boss'142 in'which anoscillating head 143 is *suit-ablysupp0rted and journalled by means ofthe ball bearings 144 and 145. A cover 146 protects the ball bearingsfrom dirt dust,. etc; The oscillating head 143 is'jprovided with anopening in which a guideptube 147 for the resistor is locked by a pin- 148 entering a recess in one side thereof. This pin in adjusted positionby a-clamping screw 140 r i provided with handle 141 for operating 148is secured toaspring 149 attached to the oscillating head. A coil spring150 surround-' ing the boss 142-and having its ends entering openings inthe boss142and the vhead 143 centers the head 143, and normally main-.tains theguide tube. 147 in radial-alinement but permits oscillationthereof during the winding operation. The guide. tube- 147 as shown inFig. 6, is provided with two recesses 147? and 1'47 located'180 apartand with either'of which the pin 148 may cooperate to maintain theguidetube in either of two positions with respect to the head 143.

Figures 8 to 12 showing the details of the mechanism for guiding the.insulating core through the'windinghead will now be described. Theinsulating core is drawn by the pulling stock 6' between two rollers 151and 152 provided with flanges 15.1 and 152 against which the edges ofthe flat insulating coremay rest as it is being drawn between therollers. The rollers 151 and 152. are positioned in openings provided inthe respecand 155.

'large enough to clear the shaft and its associsuitable pins passingtherethrough. The arms 153 and 154 at their rear ends are keyed to therespective shafts 155 and 156 and rotate therewith but arelongitudinallyslidable thereon, so that the rollers may be adjusted to and from thecenter. The shafts 155 and 156 are journalled in opposite sides of arectangular frame 157 seated in a rectangular opening in the bearingmember 116. The rollers 151 and 152 are normally urged toward each otherby two springs 158 and 159. One end of the spring 158 is seated in arecess in'the arm v154 and the other end in a recess in a rearwardlyextending arm 160 formed integrally with or otherwise suitably securedto the angle plate 162. Similarly, one end of the spring 159 is seatedin a recess in the arm 153 and the other end in a recess in a.rearwardly extending arm 161 formed intdgrallywith or otherwise suitablysecured to the angle plate 163. I

' The arms 160 and 161 at their rear ends are forked, and openings areprovided in the forks whereby the arms. may be supported by therespective rocking shafts 156 The openings in the folks are ated key, sothat the arms 160and 161 are not affected by the rocking'mo'vement ofthe shafts 155 and 156. 1

When the arms 154 5115.169 21% assembled on the shaft 1 ,6, the huh-154? of-the am 154 is positioned etween the forks of the arm 160,so that{the transverse. position of the arm 154 may be varied'by movement ofthe arm ;l,60.1f SimilarlyQWlien'the arms 153 and 161 are assembled onthe shaft-1155, the hub 153 ofthearm-153 is positioned between the forksof thearm 161, so? that the transverse position of ithe aim 153 may bevaried by movementfoffthearm 1611 I The angle plates162 and 163 areseated at their upper end in a slot. 166 and at their lower end in aslot 167, the slots being provided in. the front face of the bearingmemher 116. Retaining plates 168 and 169 attached to the front face oftheretaining plates are provided for the upper and lower ends of theangle plates 162 and 163. The angle plates 162 and 163 are thusdefinitely positioned whereby the rearwardly extending arms thereof arefirmly supported.

In order that the rollers 151 and 152 may be moved to and from thecenter to accommodate different widths of insulating core, the angleplates 162 and 163 and associated arms are arranged to be, movedtransversely to the bearing member 116. To this end, right and left handscrews 17 0 and 171 positioned in transverse openings in the bearingmember 116 have threaded engagement with the respective arms 160 and161. The two screws 17 0 arid 171 may be suitably connected, so thatthey may be operated simultaneously to cause the simultaneous movementof the angle plates and associated arms and consequently thesimultaneous movement of the rollers 151 and 152 to or from the center.

In order that the insulating core may be held firmly'and in order toprotect the edges thereof while the resistor is being wound thereon, theinsulating. core after leaving the rollers 151 and 152 is drawn betweentwo angle strips 172 and 173. The angle strip 172 is attached to avertical extension of the arm 154 and the angle strip 173 to a verticalextension of the arm 153.

As previously explained, the springs 158 and 159 urge the arms 153' and154ot0ward each other, so that the insulatin core, as it is being drawnthrough the win ing head, is firml engaged by the rollers 151 and 152and y the strips 172 and 173. While the arms 153 and 154 are keyed tothe rocker shafts 155 and 156, there is sufficient play to preventinterfering with the action of thesprings 158 and 159.

Before starting the winding operation, it is desirable that theinsulating strip or core be properiy positioned in the core guidingmechanism ofthe winding head. In order that the arms 153 and 154 andparts carried thereby may be forced apart against the action of the srings 158 and 159, a pair of levers 174 and 175 are provided. The lever174 is keyed and locked to the rocker shaft 156 and the lever 175 to therocker shaft 155. The free ends of the levers 17 4 and 175 rest upon theinner surface of a cam ring 176 which is seated in a circular openinwithin the hollow bearing member 116. T e inner end of a funnel shapedring 177 is attached to. the cam ring 17 6, so that by rocking the ring177 about its axis by means of the protecting handles 178, the cam 17 6causes the levers 174 and 175 to rock the shafts 155 and 156. Therollers 151 and 152 and the angle strips 172 and 173 are thus separatedto permit the positioning of the insulating ring 177 may be maintainedin position by screws 179 passing through slots in the ring 177 andhaving engagement with the'be ring member 116. The screws 179 andcooperating slots also serve to limit .the oscillatory movement of thetwo rings.

By providing the funnel shaped opening in the bearing member 116, thecore guiding mechanism is readily accessible from the rear.Consequently, it is possible to position in the winding head, very shortlengths of insulating cores which are required in some classes ofelectrically heated apparatus.

The winding head as constructed is a unit which. maybe readily removedfrom the bracket 114 after first removing .the gear 120 and'the nut 118.it

, By taking out the thumb screws 131, the disks 128 and 129 maybe-readily removed from the winding head. The spool 124, if empty, maythen befremoved'and replaced by one containing a supply of resistor.

In order that the resistor 180 may properly guided from the spool 124i'nto the, guide tube147, the resistor 180 first passes.

between'a pair of flanged'rollers 181', then betweena pair of flangedrollers .182 and finally over'Ia flanged roller 183 directly into theopening through the guide tube 147.

The pair of guide rollers 181 are carried 'by an arm 184 supported froma bracket 185.

The bracket 185 is formed integrally with or is otherwisesuitablyattached to the disk 128 and extends radially therefrom.

The pair of guide rollers 182 are carried by an arm 186"adjustablysecured tofthe disk 128i'and a bracket 187 byv means ofscrews'or bolts 188 and 189. Thebracket 187 is secured to andsupportedby the disk 1.28 at :the top of theguide rails'13 8-and 139.The guide roller 183 issupported on' a pin 1% fastened in the bracket187.

A protecting cover 191'is provided for all moving parts of the windinghead except thehandwheel 122 which left exposed so that it is readilyaccessible to the operator for positively controlling the winding of theresistoron the insulating core The cover 191 is made of two parts, theupper of which I is hinged to thevlower so that it may be 40- ,wound'thereon -may be drawn from the winding head by'the pulling stock.

:easily opened. I The front face of the core is 'provided'with a centralopening through whlch the insulating core with the resistor The resistor18G enters the opening in the guide tube'147 at the dead center thereofso that the oscillatory movement of the guide tube du'ring the winding.operation ing core and has an edgethereof-in alinement with one edge ofthe (insulating core, while the other-angle strip is similarly p0-sitioned below the insulating corebut at the other edge thereof.

The resistor 180' passes directlyfrom the ilowerendof'the guide tube 147onto the angle strips 172 and 17 3 and the insulating core .positionedtherebetween. I strips 172 and 1173 therefore protect the edges of theinsulating core during the winding operation, and eliminate or greatlyreduce the breaking of the insulating core at Since the tube 147is'radially adjustable, the, guide These angle its edges. When it isunderstood that the insulating core usually" is a flat strip of 'mica,the importance of protecting theedges' thereof will be appreciated.Furthermore,

during the winding operation, the guide tube 147 initsoscillationsfollows very close-f ly .the outer edges of the insulatingfcore,

thereby maintaining a minimum distance I between the. outlet end of theguide tube 147 and the insulating core, and windin the resistor thereonevenly: and with uni orm" tension. a

plate 137 carrying" the guide tube 147 may be positioned so thatthe verybest possible results may be obtained with insulating cores of differentwidths. I 7/ The thumb screw 13,4'o :t .thespring brake may betightenedup sufficiently to lock the spool 124 to the gear hubf125, 'when,- if

desired, the spool maybe refilled with resistance -Wire without removingthe spool from the winding head. .What is claimed is:} i, a i

1. In a winding machine, the combination with a rotatable member and asupport for material to be wound carried by said memher, of a corememberotangular cross section about which said material is adapted to Ibe wound, guiding means for said material. including,- means enablingshifting of the direction 01: travel of said material out of radialalinement with respect to the center of said core member to therebymaintain a minimum distance between the outlet end of said guiding meansa'nd the surface of said c'ore.

2 A winding fnachinefcomprising a ro tatable head, a rotatable supportfor the material to be wound carried by the head, and means for guidingthe. material from the support to a core on which it to'be wound,-saidmeans including a .radially.adjustable member carried by thehea'd pandaguide pivotally mounted on said member.'

3. In a winding machine, the 'ciombinfation with a rotatable head memberanda support for; material tobe wound carried by'said member, of guidingmeans for "the material including means enabling shifting of thedirection of travel of the material being wound in a manner to minimizevariations in the distance between said guiding means and the materialimmediately after winding thereof.

4. In a winding machine, the combination with a rotatable headmember anda support for material to be wound carried by said member, of guidingmeans for the material including 'means for. maintaining a relativelylarge angle between the material immediately before winding and the ma.terial immediately after winding under conditions of variation inradiusof the wound y, of. material.

direction of trave 5. A machine for winding a conductor on an insulatingcore, having in combinawhich the material is to be wound, and

means for guiding the material from the rotatable member to the corepivotally mounted on the rotatable member.

7. In a winding machine, the combination with a rotatable member and asupport for material to be wound carried by said member, of windingmeans for the material including means for maintaining substantially aconstant angle between the material immediately before winding and thematerial immediately after winding, during shifting of the. region ofjunction between such wound and unwound material with reference to theaxis of rotation of said head member.

8. In a winding machine, the combination with a rotatable head memberand a support for material to be wound carried by said member, ofguiding means for the material including meansto be actuated by thematerial bein wound for varying the Iof the latter in response toshifting oi the re ion of junction between the wound and t e unwoundmaterial with reference to the axis of rotation of said head member, tothereby maintain substantially a constant and relatively obtuse anglebetween the material immediately before winding and the materialimmediately after winding. I

9. In a winding head for a winding machine having in combination astationary member with an opening therein, a rotatable supporting memberfor the material to be wound, means for moving through the opening acore on which the material is to be wound, adjustable core guiding andpositioning means located within the opening, and means for guiding thematerial from the rotatable supporting member to the core pivotallysupported by the rotatable member.

10. In a winding head for a winding ma chine having in combination astatlonary member with an opening therein, a rotatable -member supportedby the stationary member, a su portin spool for the materialto be wouncarrie by the rotatable member, guiding and positioning means for a coreon which the material is to be wound supported within the opening, andmeans for guiding the material from the spool to'the core pivotallysupported by the rotatable member.

11. In a winding head for a winding machine, in combination, astationary member having an opening therein, a rotatable supportingmember for the material to be wound, guiding rollers for a core on whichthe material is to be wound supported within'the opening, and means forguiding the material from the rotatable member to the core pivotallysupported by the rotatable member.

12. A winding head for a winding machine comprising a stationary memberwith an opening therein, a rotatable supporting member adapted for thematerial to be wound mounted on the stationary member, adjustable armssupported within the open ing, guide rollers for a core on which thematerial is to be wound carried by the arms, and means for guiding thematerial from the rotatable member to the core.

13. A Winding head for applying material to a core comprising astationary member having an opening therein, a rotatable materialsupporting member mounted on the stationary member, core guiding andpositioning members located within the opening, a pair of coreprotecting fingers-supported by and projecting from the guid; ing andpositioning members, and means for guiding the material from therotatable supporting member over the protecting fingers and onto thecore,- said guiding means being pivotally supported by the rotatablemember.

14:. In a winding machine for applying material to a core, thecombination of 'a rotatable material supporting head gore,

guiding and positionlng members, coreprotecting fingers supported bysaid members, and means for guiding the material from the rotatable headover .the protecting fingers and onto the core.

15. In a winding machine, the combination of a'rotatable head adapted tocarry the material to be wound, guiding and posi-- tioning members for acore on which the material is to be wound, core protecting fingerssupported by said members, and means forguiding the material from therotatable head over the protecting fingers and onto the core andincluding a guide pivotally supported by the rotatable head.

16. In a winding machine for applying material to a core, thecombination of a rotatablematerial supporting head having an openingthrough which the core is adapted I to extend, a pair of bracketsextending into the opening, rollers rotatably mounted in the brackets,core protecting fingers fastened to the brackets and co-operating withthe rollers to position and guide the core, and means for guiding thematerial from the rotatable head over the protecting fin gers and ontothe core.

17, In a winding machine, the combina tion of a rotatable head adaptedto carry the material to be Wound and having an opening through which acore is adaptedto extend, a pair of adjustable arms, rollers for guidingand positioning the core carried by the arms, core protecting'fingerscarried by the arms, and means for guiding the material from therotatable head over. the protectingfingers and onto the'core.

1-8. In a Winding machine for applying material to a core,thecombinatioii of a ro-g tatable material supporting head having anopening therein, means'for' feeding the core through the'opening, meansfor guidingthe material from the rotatable head onto the 'core andincluding a guide finger pivotally mounted on the head to swing, in aplane at an angle to the axis of rotation-of the head,

means for determining the pitch at which the material is wound on-thecore, and means t for changing the of the machine. i 19. In a Windingmachine, the combine pitchduring the operation tion with a winding headhaving a rotative member to supply and apply the winding material to andabout a non-rotative-core,

of means for so moving the core that the a rate of suchmovement is ameasure of the winding pitch and means providing ing the speed changesso preselected to Wading operation.

22;.In a machine for winding materialfor thereafter causing the machineto wind at the pitch so preselected. 7

21. In Ia'maehine for winding material on a core, 'the'combination of arotatable head adapted to carry and apply the material to the core,means for moving the core in a plane transverse to the plane of rotationof the head and at a predetermined rate, said means including. a drivingdisk and a driven disk whose periphery is in functional engagement withthe face of the driving l i disk, and means for varying the position ofthe driven disk on the driving disk to change the rate of movement ofthe core during the upona core, the combination with a rotative I I headmember adapted to carry the material,

a driving shaft, means for driving said head. member from said shaft andapulling stock for drawing the core through anopening-in said headmember at a rate'which is a measure of the Winding pitch of anadjustable] driving connection between said driving for presettingadesired drive ratio during operation of the drive. at a differentratio.

23. In a machine for winding a conductor 'm r shaft and" saidpulling'stock and control means'for saiddriving connection providing: Ti

on an insulating core, a rotatable head hav= ingan opening through whichthe insulating core passes, a support for the conductor carried by thehead, a driving shaft, means for driving the head from the shaft, a pairof clamping jaws for gripping the insulating core, a guide for theclamping jaws,

means driven by the shaft and cooperating with the guide to move theclamping jaws in a plane transverse to the plane of rotationof the head,and means operable during the winding operation for changing the rate ofmovement of the clamping jaws so as to change the winding pitch.

In witness whereof, I have hereunto subscribed my name.

. EDWIN N. LlGHTFOOT.

